net: ethernet: bgmac: Add platform device support

The bcma portion of the driver has been split off into a bcma specific
driver.  This has been mirrored for the platform driver.  The last
references to the bcma core struct have been changed into a generic
function call.  These function calls are wrappers to either the original
bcma code or new platform functions that access the same areas via MMIO.
This necessitated adding function pointers for both platform and bcma to
hide which backend is being used from the generic bgmac code.

Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 315 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bgmac-bcma.c b/drivers/net/ethernet/broadcom/bgmac-bcma.c
new file mode 100644
index 000000000000..9a9745c4047c
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c
@@ -0,0 +1,315 @@
+/*
+ * Driver for (BCM4706)? GBit MAC core on BCMA bus.
+ *
+ * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#define pr_fmt(fmt)		KBUILD_MODNAME ": " fmt
+
+#include <linux/bcma/bcma.h>
+#include <linux/brcmphy.h>
+#include <linux/etherdevice.h>
+#include "bgmac.h"
+
+static inline bool bgmac_is_bcm4707_family(struct bcma_device *core)
+{
+	switch (core->bus->chipinfo.id) {
+	case BCMA_CHIP_ID_BCM4707:
+	case BCMA_CHIP_ID_BCM47094:
+	case BCMA_CHIP_ID_BCM53018:
+		return true;
+	default:
+		return false;
+	}
+}
+
+/**************************************************
+ * BCMA bus ops
+ **************************************************/
+
+static u32 bcma_bgmac_read(struct bgmac *bgmac, u16 offset)
+{
+	return bcma_read32(bgmac->bcma.core, offset);
+}
+
+static void bcma_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
+{
+	bcma_write32(bgmac->bcma.core, offset, value);
+}
+
+static u32 bcma_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
+{
+	return bcma_aread32(bgmac->bcma.core, offset);
+}
+
+static void bcma_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
+{
+	return bcma_awrite32(bgmac->bcma.core, offset, value);
+}
+
+static bool bcma_bgmac_clk_enabled(struct bgmac *bgmac)
+{
+	return bcma_core_is_enabled(bgmac->bcma.core);
+}
+
+static void bcma_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
+{
+	bcma_core_enable(bgmac->bcma.core, flags);
+}
+
+static void bcma_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
+				       u32 mask, u32 set)
+{
+	struct bcma_drv_cc *cc = &bgmac->bcma.core->bus->drv_cc;
+
+	bcma_chipco_chipctl_maskset(cc, offset, mask, set);
+}
+
+static u32 bcma_bgmac_get_bus_clock(struct bgmac *bgmac)
+{
+	struct bcma_drv_cc *cc = &bgmac->bcma.core->bus->drv_cc;
+
+	return bcma_pmu_get_bus_clock(cc);
+}
+
+static void bcma_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset, u32 mask,
+				     u32 set)
+{
+	bcma_maskset32(bgmac->bcma.cmn, offset, mask, set);
+}
+
+static const struct bcma_device_id bgmac_bcma_tbl[] = {
+	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_4706_MAC_GBIT,
+		  BCMA_ANY_REV, BCMA_ANY_CLASS),
+	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_MAC_GBIT, BCMA_ANY_REV,
+		  BCMA_ANY_CLASS),
+	{},
+};
+MODULE_DEVICE_TABLE(bcma, bgmac_bcma_tbl);
+
+/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */
+static int bgmac_probe(struct bcma_device *core)
+{
+	struct ssb_sprom *sprom = &core->bus->sprom;
+	struct mii_bus *mii_bus;
+	struct bgmac *bgmac;
+	u8 *mac;
+	int err;
+
+	bgmac = kzalloc(sizeof(*bgmac), GFP_KERNEL);
+	if (!bgmac)
+		return -ENOMEM;
+
+	bgmac->bcma.core = core;
+	bgmac->dev = &core->dev;
+	bgmac->dma_dev = core->dma_dev;
+	bgmac->irq = core->irq;
+
+	bcma_set_drvdata(core, bgmac);
+
+	switch (core->core_unit) {
+	case 0:
+		mac = sprom->et0mac;
+		break;
+	case 1:
+		mac = sprom->et1mac;
+		break;
+	case 2:
+		mac = sprom->et2mac;
+		break;
+	default:
+		dev_err(bgmac->dev, "Unsupported core_unit %d\n",
+			core->core_unit);
+		err = -ENOTSUPP;
+		goto err;
+	}
+
+	ether_addr_copy(bgmac->mac_addr, mac);
+
+	/* On BCM4706 we need common core to access PHY */
+	if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
+	    !core->bus->drv_gmac_cmn.core) {
+		dev_err(bgmac->dev, "GMAC CMN core not found (required for BCM4706)\n");
+		err = -ENODEV;
+		goto err;
+	}
+	bgmac->bcma.cmn = core->bus->drv_gmac_cmn.core;
+
+	switch (core->core_unit) {
+	case 0:
+		bgmac->phyaddr = sprom->et0phyaddr;
+		break;
+	case 1:
+		bgmac->phyaddr = sprom->et1phyaddr;
+		break;
+	case 2:
+		bgmac->phyaddr = sprom->et2phyaddr;
+		break;
+	}
+	bgmac->phyaddr &= BGMAC_PHY_MASK;
+	if (bgmac->phyaddr == BGMAC_PHY_MASK) {
+		dev_err(bgmac->dev, "No PHY found\n");
+		err = -ENODEV;
+		goto err;
+	}
+	dev_info(bgmac->dev, "Found PHY addr: %d%s\n", bgmac->phyaddr,
+		 bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : "");
+
+	if (!bgmac_is_bcm4707_family(core)) {
+		mii_bus = bcma_mdio_mii_register(core, bgmac->phyaddr);
+		if (!IS_ERR(mii_bus)) {
+			err = PTR_ERR(mii_bus);
+			goto err;
+		}
+
+		bgmac->mii_bus = mii_bus;
+	}
+
+	if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
+		dev_err(bgmac->dev, "PCI setup not implemented\n");
+		err = -ENOTSUPP;
+		goto err1;
+	}
+
+	bgmac->has_robosw = !!(core->bus->sprom.boardflags_lo &
+			       BGMAC_BFL_ENETROBO);
+	if (bgmac->has_robosw)
+		dev_warn(bgmac->dev, "Support for Roboswitch not implemented\n");
+
+	if (core->bus->sprom.boardflags_lo & BGMAC_BFL_ENETADM)
+		dev_warn(bgmac->dev, "Support for ADMtek ethernet switch not implemented\n");
+
+	/* Feature Flags */
+	switch (core->bus->chipinfo.id) {
+	case BCMA_CHIP_ID_BCM5357:
+		bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
+		bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
+		bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL1;
+		bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_PHY;
+		if (core->bus->chipinfo.pkg == BCMA_PKG_ID_BCM47186) {
+			bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
+			bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_RGMII;
+		}
+		if (core->bus->chipinfo.pkg == BCMA_PKG_ID_BCM5358)
+			bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_EPHYRMII;
+		break;
+	case BCMA_CHIP_ID_BCM53572:
+		bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
+		bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
+		bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL1;
+		bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_PHY;
+		if (core->bus->chipinfo.pkg == BCMA_PKG_ID_BCM47188) {
+			bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_RGMII;
+			bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
+		}
+		break;
+	case BCMA_CHIP_ID_BCM4749:
+		bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
+		bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
+		bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL1;
+		bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_PHY;
+		if (core->bus->chipinfo.pkg == 10) {
+			bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_RGMII;
+			bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
+		}
+		break;
+	case BCMA_CHIP_ID_BCM4716:
+		bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
+		/* fallthrough */
+	case BCMA_CHIP_ID_BCM47162:
+		bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL2;
+		bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
+		break;
+	/* bcm4707_family */
+	case BCMA_CHIP_ID_BCM4707:
+	case BCMA_CHIP_ID_BCM47094:
+	case BCMA_CHIP_ID_BCM53018:
+		bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
+		bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;
+		bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
+		break;
+	default:
+		bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
+		bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
+	}
+
+	if (!bgmac_is_bcm4707_family(core) && core->id.rev > 2)
+		bgmac->feature_flags |= BGMAC_FEAT_MISC_PLL_REQ;
+
+	if (core->id.id == BCMA_CORE_4706_MAC_GBIT) {
+		bgmac->feature_flags |= BGMAC_FEAT_CMN_PHY_CTL;
+		bgmac->feature_flags |= BGMAC_FEAT_NO_CLR_MIB;
+	}
+
+	if (core->id.rev >= 4) {
+		bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;
+		bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;
+		bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;
+	}
+
+	bgmac->read = bcma_bgmac_read;
+	bgmac->write = bcma_bgmac_write;
+	bgmac->idm_read = bcma_bgmac_idm_read;
+	bgmac->idm_write = bcma_bgmac_idm_write;
+	bgmac->clk_enabled = bcma_bgmac_clk_enabled;
+	bgmac->clk_enable = bcma_bgmac_clk_enable;
+	bgmac->cco_ctl_maskset = bcma_bgmac_cco_ctl_maskset;
+	bgmac->get_bus_clock = bcma_bgmac_get_bus_clock;
+	bgmac->cmn_maskset32 = bcma_bgmac_cmn_maskset32;
+
+	err = bgmac_enet_probe(bgmac);
+	if (err)
+		goto err1;
+
+	return 0;
+
+err1:
+	bcma_mdio_mii_unregister(bgmac->mii_bus);
+err:
+	kfree(bgmac);
+	bcma_set_drvdata(core, NULL);
+
+	return err;
+}
+
+static void bgmac_remove(struct bcma_device *core)
+{
+	struct bgmac *bgmac = bcma_get_drvdata(core);
+
+	bcma_mdio_mii_unregister(bgmac->mii_bus);
+	bgmac_enet_remove(bgmac);
+	bcma_set_drvdata(core, NULL);
+	kfree(bgmac);
+}
+
+static struct bcma_driver bgmac_bcma_driver = {
+	.name		= KBUILD_MODNAME,
+	.id_table	= bgmac_bcma_tbl,
+	.probe		= bgmac_probe,
+	.remove		= bgmac_remove,
+};
+
+static int __init bgmac_init(void)
+{
+	int err;
+
+	err = bcma_driver_register(&bgmac_bcma_driver);
+	if (err)
+		return err;
+	pr_info("Broadcom 47xx GBit MAC driver loaded\n");
+
+	return 0;
+}
+
+static void __exit bgmac_exit(void)
+{
+	bcma_driver_unregister(&bgmac_bcma_driver);
+}
+
+module_init(bgmac_init)
+module_exit(bgmac_exit)
+
+MODULE_AUTHOR("Rafał Miłecki");
+MODULE_LICENSE("GPL");